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Page 1006​

DICOM PS3.3 2020a - Information Object Definitions​

Defined Term Name​

Defined Term Description​

CARDIAC​

Images of the heart​

CARDIAC_GATED​

Cardiac gated images, other than of the heart​

CARDRESP_GATED​

Cardiac and respiratory gated images​

DYNAMIC​

An image in which the same anatomical volume is imaged at multiple times in order to​

 

capture images of a non-cyclic, time varying event. For example, imaging of the uptake​

 

of a tracer or contrast in a specific organ over time.​

 

Note​

 

This is different from gating techniques, in which the same anatomical volume​

 

is imaged during some portion of a cyclic event, e.g., inspiration or R-R Interval.​

FLUOROSCOPY​

Real-time collection of single slices (e.g., CT or MR Fluoroscopy)​

LOCALIZER​

Collected for the purpose of planning other images.​

MOTION​

Collected for looking at body motion​

PERFUSION​

Collected for the purposes of perfusion calculations.​

PRE_CONTRAST​

Collected before contrast was administered​

POST_CONTRAST​

Collected during or after contrast was administered​

RESP_GATED​

Respiratory gated images​

REST​

Cardiac rest image set​

STATIC​

A group of frames at varying spatial locations acquired at the same time.​

STRESS​

Cardiac stress image set​

VOLUME​

Set of frames that define a regularly sampled volume​

NON_PARALLEL​

Set of frames that are not parallel​

PARALLEL​

Set of frames that are parallel but do not constitute a regularly sampled volume​

WHOLE_BODY​

A group of frames of the whole body; the frames may be acquired at various times (as​

 

distinct from STATIC).​

C.8.16.1.4 Derived Pixel Contrast​

Value 4 shall be used to indicate derived pixel contrast - generally, contrast created by combining or processing images with the same​ geometry. Value 4 shall have a value of NONE when Value 1 is ORIGINAL.​

Value 4 may have the value QUANTITY if the derived pixel contrast is described in the Quantity Definition Sequence (0040,9220) of​ the Real World Value Mapping Functional Group Macro.​

Note​

If more than one of the following derived types is applicable, then it is up to the generating application to specify the value​ that best characterizes the derived image.​

Value 4 of Image Type (0008,0008) and Value 4 of Frame Type (0008,9007) shall not be zero length unless the SOP Class UID is​ "1.2.840.10008.5.1.4.1.1.2.2" or "1.2.840.10008.5.1.4.1.1.4.4" or "1.2.840.10008.5.1.4.1.1.128.1" (Legacy Converted).​

Table C.8-130 specifies the Defined Terms for Value 4 for Image Type (0008,0008) and Frame Type (0008,9007) that are common​ to CT and MR. Additional Defined Terms are defined in the modality-specific Module and Macro definitions.​

Table C.8-130. Image Type and Frame Type Value 4 Common​

Defined Term Name​

Defined Term Description​

ADDITION​

Created through Pixel by pixel addition operation​

DIVISION​

Created through Pixel by pixel division operation​

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DICOM PS3.3 2020a - Information Object Definitions​

Page 1007​

Defined Term Name​

Defined Term Description​

 

MASKED​

Created through Pixel by pixel masking operation​

 

MAXIMUM​

Created through Pixel by Pixel maximum operation​

 

MEAN​

Created through Pixel by pixel mean operation​

 

MINIMUM​

Created through Pixel by Pixel minimum operation​

 

MULTIPLICATION​

Created through Pixel by pixel multiplication operation​

 

RESAMPLED​

Pixels have been spatially re-sampled, e.g., MPR​

 

STD_DEVIATION​

Standard Deviation​

 

SUBTRACTION​

Created through Pixel by pixel subtraction operation​

 

NONE​

Not a calculated image​

 

QUANTITY​

DerivedpixelvaluesareaquantitydescribedbyQuantityDefinitionSequence(0040,9220)​

 

of the Real World Value Mapping Functional Group Macro.​

 

MIXED​

Used only as value in Image Type (0008,0008) if frames within the image SOP Instance​

 

contain different values for value 4 in their Frame Type (0008,9007) Attribute.​

C.8.16.2 Common CT/MR Image Description Macro​

This section describes the Common CT/MR Image Description Macro.​

Table C.8-131 specifies the Attributes of the Common CT/MR Image Description Macro.​

Table C.8-131. Common CT/MR Image Description Macro Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Pixel Presentation​

(0008,9205)​

1​ Indication of the presence or absence of color information that may​

 

 

 

beusedduringrendering.SeeSectionC.8.16.2.1.1foradescription​

 

 

 

and Enumerated Values.​

Volumetric Properties​

(0008,9206)​

1​ Indication ifgeometric manipulations arepossible with framesinthe​

 

 

 

SOP Instance. See Section C.8.16.2.1.2 for a description and​

 

 

 

Enumerated Values.​

Volume Based Calculation​

(0008,9207)​

1​ Method used for volume calculations with frames in the SOP​

Technique​

 

 

Instance. See Section C.8.16.2.1.3 for a description and Defined​

 

 

 

Terms.​

C.8.16.2.1 Common CT/MR Image Description Attribute Description​

C.8.16.2.1.1 Pixel Presentation​

 

Table C.8-132. Pixel Presentation Attribute Values​

Enumerated Value Name​

Enumerated Value Description​

COLOR​

Image is best displayed in color using Supplemental Palette Color LUTs, but can be displayed in​

 

grayscale if current display does not support color. See Section C.8.16.2.1.1.1.​

MONOCHROME​

Image is intended to be displayed in grayscale only. No Supplemental Palette Color LUTs are​

 

supplied.​

MIXED​

Used only as a value in Pixel Presentation (0008,9205) in the Enhanced MR Image Module or​

 

Enhanced CT Image Module if frames within the image SOP Instance contain different values for​

 

thePixelPresentationAttributeintheMRImageFrameTypeFunctionalGrouporCTImageFrame​

 

Type Functional Group.​

TRUE_COLOR​

Image can be displayed in color only​

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Page 1008​

DICOM PS3.3 2020a - Information Object Definitions​

C.8.16.2.1.1.1 Supplemental Palette Color LUTs​

Figure C.8-20 presents two separate image visualization pipelines that can be used for interpreting the stored pixel values.​

If Pixel Presentation (0008,9205) equals COLOR, the stored values are split into two ranges. The stored values up to one less than​ the second value of the Red, Green and Blue Palette Color Lookup Table Descriptor (0028,1101-1103) are passed through the gray​ scale visualization pipeline. The values equal to or greater than the second value of the Red, Green and Blue Palette Color Lookup​ Table Descriptor (0028,1101-1103) are mapped by the Palette Color LUTs.​

Note​

1.​Some images may be purely color, and there will be no grayscale range of stored pixel values "below" those that are​ passed through the color lookup tables.​

2.​ImagescontainingSupplementalPaletteColorLUTscannotbeirreversibly(lossy)compressed,sincethatwouldpotentially​ change the index values and result in different colors being rendered.​

The complete range of stored pixel values can also be displayed via the grayscale visualization pipeline only, but the information​ content may be less useful because the color information is not available.​

...

 

 

 

 

 

 

 

 

 

 

 

 

Mapped to

 

Range of

 

 

 

 

gray level RGB values

Stored

Modality LUT

VOI LUT

Presentation

by display device

Values to be

 

LUT

 

 

 

Transformation

Transformation

 

 

 

 

mapped to

Transformation

 

 

 

 

 

 

 

 

grayscale

 

 

 

 

 

 

 

 

 

 

 

 

+

 

Color

 

 

 

 

 

Display

 

 

 

 

 

 

 

 

R

G

B

 

 

 

 

First Stored

 

 

 

 

 

 

 

Pixel Value

 

 

 

 

 

 

Range of

Mapped (2nd

 

 

 

 

 

 

value of LUT

 

 

 

 

 

 

Stored

Descriptor)

 

 

 

 

 

 

Values to be

Palette Color

 

 

 

 

 

mapped to

Number of Entries

 

 

 

 

 

color

 

 

 

 

 

 

 

...

 

 

 

 

 

 

 

Figure C.8-20. MONOCHROME2 Photometric Interpretation with Supplemental Palette Color Mapping​

C.8.16.2.1.2 Volumetric Properties​

ThevalueofVolumetricProperties(0008,9206)allowsapplicationsdoinggeometricmanipulations(e.g.,MAX_IPorMPRorplanning)​ to determine if the image is an appropriate candidate for an operation without having to know all the details of the generating applic-​ ation.​

Table C.8-133 specifies the Enumerated Values for Volumetric Properties (0008,9206).​

 

Table C.8-133. Volumetric Properties Attribute Values​

Enumerated Value​

Enumerated Value Description​

Name​

 

VOLUME​

Image contains pixels that represent the volume specified for the image (Examples: Volume Based​

 

Calculation Technique (0008,9207) is NONE or MPR).​

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DICOM PS3.3 2020a - Information Object Definitions​

Page 1009​

Enumerated Value​

Enumerated Value Description​

 

Name​

 

 

SAMPLED​

The specified frame or each frame within the image will not contain a representation of the average​

 

information in the slice direction because the frame was calculated by the non-linear re-sampling of a​

 

volume where each pixels of the resulting frame does not contain an average representation of the voxel​

 

represented by the frame's pixel.​

 

 

For example a projection (MAX_IP) frame uses the maximum value along a ray for each pixel rather than​

 

the average value of the represented voxel.​

 

DISTORTED​

Image contains significantly distorted information from what is specified by the image volume Attributes.​

 

For example this image should not be used in planning or for 3D volume. An example of this image type​

 

is a curved reformatted image (CURVED_MPR).​

 

MIXED​

Used only as a value in Volumetric Properties (0008,9206) in the Enhanced MR Image Module Attribute​

 

Description or Enhanced CT Image Module if frames within the image SOP Instance contain different​

 

values for Volumetric Properties (0008,9206) in the MR Image Frame Type Functional Group or CT Frame​

 

Type Functional Group.​

 

Note​

A value of MIXED may be necessary if creating a Legacy Converted Enhanced image and insufficient information is present​ to specify a more specific value.​

C.8.16.2.1.3 Volume Based Calculation Technique Attribute​

ThevalueofVolumeBasedCalculationTechnique(0008,9207)shallbeusedtoindicatethemethodusedforcalculatingpixelsbased​ on geometry.​

Shall have a value of NONE when Value 1 of Image Type (0008,0008) or Value 1 of Frame Type (0008,9007) is ORIGINAL.​

Table C.8-134 specifies the Defined Terms for the Volume Based Calculation Technique (0008,9207) Attribute.​

Table C.8-134. Volume Based Calculation Technique Attribute Values​

Defined Term Name​

Defined Term Description​

MAX_IP​

Maximum Intensity Projection​

MIN_IP​

Minimum Intensity Projection​

VOLUME_RENDER​

Volume Rendering Projection​

 

Volume Rendering Image represents 3D voluminar information constructed from measured​

 

voxel intensities covering a 3D volume.​

SURFACE_RENDER​

Surface Rendering Projection​

 

Surface Rendering Image represents 3D surface information constructed from measured voxel​

 

intensities covering a 3D volume.​

MPR​

Multi-Planar Reformat​

CURVED_MPR​

Curved Multi-Planar Reformat​

NONE​

Pixels not derived geometrically​

MIXED​

Used only as a value in Volume Based Calculation Technique (0008,9207) Attribute in the​

 

Enhanced MR Image Module or MR Spectroscopy Module if frames within the image SOP​

 

Instance contain different terms for the Volume Based Calculation Technique Attribute in MR​

 

Frame Type Functional Group or MR Spectroscopy Frame Type Functional Group.​

Note​

 

A value of MIXED may be necessary if creating a Legacy Converted Enhanced image and insufficient information is present​ to specify a more specific value.​

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Page 1010​

DICOM PS3.3 2020a - Information Object Definitions​

C.8.17 Ophthalmic Photography and Tomography Modules​

C.8.17.1 Ophthalmic Photography Series Module​

Table C.8.17.1-1 specifies the Attributes that describe an Ophthalmic Photography Series.​

Table C.8.17.1-1. Ophthalmic Photography Series Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Modality​

(0008,0060)​

1​

SourceequipmentthatproducedtheOphthalmicPhotography​

 

 

 

Series.​

 

 

 

Enumerated Values:​

 

 

 

OP​

C.8.17.2 Ophthalmic Photography Image Module​

Table C.8.17.2-1 specifies the Attributes that describe an Ophthalmic Photography Image produced by Ophthalmic Photography​ equipment (OP) imaging Modalities.​

Table C.8.17.2-1. Ophthalmic Photography Image Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Image Type​

(0008,0008)​

1​

Image identification characteristics.​

 

 

 

See Section C.8.17.2.1.4 for specialization.​

Instance Number​

(0020,0013)​

1​

A number that identifies this image.​

Samples per Pixel​

(0028,0002)​

1​

Number of samples (planes) in this image.​

 

 

 

Enumerated Values:​

 

 

 

3​

 

 

 

1​

 

 

 

See Section C.8.17.2.1.2 for further explanation.​

Samples per Pixel Used​

(0028,0003)​

1C​

The number of samples (planes) containing information.​

 

 

 

Enumerated Values:​

 

 

 

2​

 

 

 

Required if different from Samples per Pixel (0028,0002).​

 

 

 

See Section C.8.17.2.1.2​

PhotometricInterpretation​

(0028,0004)​

1​

Specifies the intended interpretation of the pixel data.​

 

 

 

See Section C.8.17.2.1.3​

Pixel Representation​

(0028,0103)​

1​

Data representation of the pixel samples.​

 

 

 

Enumerated Values:​

 

 

 

0​

- Standard -​

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